package edu.xidian.bdilab.jrbigdata.configuration;


import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author Catfish
 * @date 2021/05/30
 * @description 用CORS过滤器配置解决跨域问题
 */

@Component
public class CORSFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException{
        HttpServletResponse response = (HttpServletResponse) res;

//        System.out.println("\n现在经过CORS:**********\n");
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
        chain.doFilter(req, res);


    }

    @Override
    public void init(FilterConfig filterConfig) {}

    @Override
    public void destroy() {}

}
